From Dr. Pulley, "HiT Clutch" user manual:
2.
Powerful takeoff but
no riding comfort.
Engaged rev too high. Replace with softer clutch spring.
Actuation timing too early. Replace with harder pillow spring.
3.
Powerful takeoff but having
vibration at initial stage
Engaged rev too low. Replace with harder clutch spring.
Belt slippage** happened in the
front driving pulley. Replace with heavier roller.
Belt slippage happened in the rear
driven pulley. 4. Replace with harder torque spring.
Smooth takeoff but solid
engagement not obvious
Belt slippage happened in the
pulley. Replace with a new belt.
* It’s dangerous to actuate the throttle fully and suddenly when softer pillow spring and harder clutch spring are used at
the same time,
as the vehicle might jump into the air abruptly to cause serious damage or injury.
** The belt slippage can happen in the pulley due to the solid engagement and less slippage with the clutch bell. The
abnormal surface temperature of pulley can be taken as checkpoint to see whether the belt slippage exists.
So apparently it IS possible to wheelie one.